字符串模式匹配

#include <stdio.h>
#include <stdlib.h>
#include<string.h>

//字符串模式匹配
int indexString(char s[],char t[],int pos)
{
    int i = pos,j=1;
    while(i<=strlen(s) && j<=strlen(t))
    {
        if(s[i-1]==t[j-1])
        {
            i++;
            j++;
        }
        else
        {
            i = i-j+2;
            j=1;
        }
    }

    if(j>strlen(t))
        return i-strlen(t);

    return 0;

 } 
int main(int argc, char *argv[]) {

    char *s = "asdfghjkl";
    char *t = "fgh";
    printf("%d\n",indexString(s,t,2));
    return 0;
}